Apex firmware update for dummies

[Gools]

Is there a simple step by step walk through on how to do a firmware update or even a video?
I get a message saying I need to update just a little scared to as I've heard a lot of stories of problems.
Thanks

 

[Salty Carlo]

 

[Salty Carlo]

for the 2016 version

 

[Gools]

great thanks very much